[PATCH v15 08/12] nvmet: add copy command support for bdev and file ns

[Hannes Reinecke]

On 9/6/23 18:38, Nitesh Shetty wrote:
> Add support for handling nvme_cmd_copy command on target.
> 
> For bdev-ns if backing device supports copy offload we call device copy
> offload (blkdev_copy_offload).
> In case of partial completion from above or absence of device copy offload
> capability, we fallback to copy emulation (blkdev_copy_emulation)
> 
> For file-ns we call vfs_copy_file_range to service our request.
> 
> Currently target always shows copy capability by setting
> NVME_CTRL_ONCS_COPY in controller ONCS.
> 
> loop target has copy support, which can be used to test copy offload.
> trace event support for nvme_cmd_copy.
> 
> Signed-off-by: Nitesh Shetty <nj.shetty at samsung.com>
> Signed-off-by: Anuj Gupta <anuj20.g at samsung.com>
> ---
>   drivers/nvme/target/admin-cmd.c   |  9 ++-
>   drivers/nvme/target/io-cmd-bdev.c | 97 +++++++++++++++++++++++++++++++
>   drivers/nvme/target/io-cmd-file.c | 50 ++++++++++++++++
>   drivers/nvme/target/nvmet.h       |  4 ++
>   drivers/nvme/target/trace.c       | 19 ++++++
>   5 files changed, 177 insertions(+), 2 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare at suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
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